1、INTRODUCTION,元誠科技股份有限公司,Yuan Cheng Technology Co. , Ltd,By Oliver Chen,GENERAL POPULAR CAPACITOR,Multi-layer Ceramic Capacitor OS-CON Capacitor Aluminum Electrolytic Capacitor Tantalum Solid Electrolytic Capacitor Specialty Polymer Capacitor Polymer Organic Semi-conductive Capacitor Film Capacitor,M
2、ulti-layer Ceramic Capacitor,Separate the system loop and the capacitors used,Digital loop Analog loop,combined ratio,Logic loop High Frequency loop Power loop Audio loop Other loop,75%,25%,Decoupling Back up,Major used around Digital IC to filter Noise,Smoothing Filter Resonant Coupling,Impedance &
3、 ESR considered more important than capacitance,Must consider temperature characteristics and capacitance on design,Loop separated,Capacitor Functions,Factor of Sound Mechanism (MLCC),Dielectric Constant of MaterialDC Bias VoltageFrequency RangeLayout of Mother Board,Mechanism of Sound Effect (MLCC)
4、,Piezo Electric with DC-Bias Vibration of MLCC With AC CurrentElectrical Mechanical,Mother Board Resonated With MLCC Big Sound (Like Speaker) SRF of MLCC Become Lower,Sound Effect of MLCC,Phenomenon AnalysisUnderstanding,Qualitative AnalysisMechanism of Vibration( Simulation ),Solution for Piezo Eff
5、ect,Quantitative AnalysisVibration - Sound Analysis,|z|,ESR,Frequency,xc,XL,SRF,SRF:Series Resonance Frequency,SRF fc=1/2 LC |Z|= ESR2+(XC-XL)2 1.if the working frequency = SRF ,XC-XL=0, |Z|=ESR 2.if the working frequency SRF, |Z| dominated by XL,About MLCC Impedance Features,Typical ESR and ESL fac
6、tors in capacitor ( 100K 10MHz ),Impedance = R 2 + ( 2f L 1/2f c) 2, Values of Tantalum electrolytic capacitor may vary depending on case size,FREQUENCY(KHZ),FREQUENCY(KHZ),FREQUENCY(KHZ),FREQUENCY(KHZ),X7R 1206 1UF/16V,X7R 1206 2.2UF/16V,X7R 1206 1.5UF/16V,X7R 1206 3.3UF/10V,Capacitance Characteris
7、tics of Frequency,ESR Characteristics of Frequency,Temperature Characteristics of Capacitance,No Bias,D/D converter output,D/D converter input,OS-CON,Aluminum solid capacitors with organic semi-conductive electrolyte,Features of OS-CON OS-CON is a low ESR capacitor ESR of OS-CON is not dependent on
8、temperature OS-CON has long-life OS-CON is a capacitor that has polarity but that is strong against reverse voltage High conductivity provides stability against temperature because has low resistance value compared to other electrolytes.,Reliability Presumption of Life,L2=L1X10 T2-(T1+Tx) /20,L2:Lif
9、e expectance(Hrs) in actual use (temperature T1),L1:Guaranteed(Hrs) at maximum temperature in use,T2:maximum operating temperature (),T1:Temperature in actual use (ambient temperature) (),Tx:Self-heating temperature by ripple current (),Tx=(Ix/Io) 2 xT,Io:Maximum allowable ripple current at +45 or l
10、ess (Arms),Ix:Actual flow of ripple current (Arms),T varies according to case size,OS-CON Electrical Characteristics,Frequency CharacteristicsTemperature CharacteristicsBias Characteristics,Temperature vs. Tan,Temperature vs. Capacitance Change,Temperature ( ),Temperature ( ),A 1uf/25WV,C 10uf/16WV,
11、F 150uf/16WV,Tan ,Capacitance Change ( % ),(120HZ),(120HZ),A 1uf/25WV,B 10uf/10WV,C 10uf/16WV,D 47uf/6.3WV,E 100uf/16WV,F 150uf/16WV,Temperature vs. Leakage current,(Rated Voltage),Temperature vs. Impedance,(100KHZ),Leakage current (uA),Impedance (),Temperature ( ),Temperature ( ),Temperature Charac
12、teristics,100,ESR(),Temperature ( ),OS=OS-CON Purple Al=Al-E Cap Blue Ta=Tantalum Green CR(X5P)=Ceramic Cap Red CR(X5U)=Ceramic Cap - Pink,Temperature Characteristics,OS=OS-CON Purple Al=Al-E Cap Blue Ta=Tantalum Green CR(X5P)=Ceramic Cap Red CR(X5U)=Ceramic Cap - Pink,Bias Voltage Characteristics,O
13、S.1=OS-CON (10SL10M)-Purple,OS.2=OS-CON (30SC10M)-Light purple,CR(X5P)=Ceramic Cap(10uf/10V) -Red,CR(X5U)=Ceramic Cap(10uf/50V) -Pink,Aluminum Electrolytic Capacitors,Material of Aluminum Electrolytic capacitor,Common Application Conditions to Avoid,The following misapplication load conditions will
14、cause rapid deterioration of a capacitors parameters. In addition,rapid heating and gas generation within the capacitor can occur,causing the pressure relief vent to operate and resultant leakage of electrolyte.Under extreme conditions,explosion and fire ignition could happen. The leaked electrolyte
15、 is combustible and electrically conductive,Reverse Voltage Repeating Charge/Discharge applications Over Voltage Exceeding Ripple current,Operating Temperature and Frequency,(1) Effect of operating temperature on electrical parametersa) At higher temperature,leakage current and capacitanceincrease w
16、hile ESR decreases.b) At lower temperature,leakage current and capacitance decreases while ESR increases. (2) Effect of operating frequency on electrical parametersa) At higher frequency,capacitance and impedance decreasewhile tan increases.b) At lower frequency,heat generated by ripple current will
17、rise due to an increase in ESR.,Application guidelines,Operating Temperature and Life expectancy,The formula for calculating expected life is as followsL1: Guaranteed life ( h ) at temperature , T1 L2: Expected life ( h ) at temperature , T2 T1: Upper category temperature ( )T2: Actual operating tem
18、perature ( ),L2 = L1 X 2 T1-T2/10,* Example *,If the specification is 2000hours at rated voltage/105 test Actually,the capacitor surface temperature is 85 L2=2000 hours * 2 105 - 85 /10 =8000 hours,How to calculate the ripple current for actual application,If the specification is 1230mA/rms at 105 /
19、100 KHz Actual measure the capacitor surface temperature is 85/100KHz Maximum permissible ripple current = 1230mA*1*1.7=2091mA/rms,*Example*,Capacitance vs. Temperature Characteristics,Impedance , ESR vs. Frequency Characteristics,Leakage current vs. Temperature Characteristics,Tan vs. Frequency Cha
20、racteristics,Tantalum Solid Electrolytic Capacitor,Material of Tantalum solid electrolytic capacitor,Circuit Design,Tantalum capacitor temperature de-rating voltage,Change in capacitance ( Dipped type),4.7f/16V,Temperature ( ),Capacitance change (%),Temperature Characteristics,Change in leakage curr
21、ent( Dipped type),4.7f/16V,Leakage current(A),Temperature (),Temperature Characteristics,Frequency ( Hz ),capacitance change ( % ),Change in capacitance (Dipped type),4.7uf/16V,Frequency Characteristics,Frequency ( Hz ),Change in Tan (Dipped type),4.7f/16V,Tan,Frequency Characteristics,Reverse Volta
22、ge,SPECTIALTY POLYMER CAPACITOR,Material of Specialty Polymer Aluminum Electrolytic Capacitor,1000,100,10,1,0.1,0.01,TCNQ,MnO2,Electrolyte,Specialty polymer,Organic semi-conductive,Tantalum,Aluminum,SP-CAP,Conductivity ( S/cm),Material of electrolyte comparison,SPECTIALTY POLYMER CAPACITOR,Features
23、of SP-cap Large capacitance Very low ESR & low impedance characteristics Stable capacitance characteristics High ripple current capability Strong surge voltage characteristicsFull voltage can be applied , no voltage de-rating,Resistivity .cm,Insulation of specialty polymer itself,Frequency Character
24、istics,Frequency Characteristics,Stable Temperature characteristics,Stable Temperature characteristics,(1)SP-Al 100uf/6.3V (2)Polymer tantalum capacitor 100uf/10V (3)Ceramic capacitor 100uf/6.3V (4)Low ESR tantalum capacitor 100uf/10V,Stable capacitance characteristics,(1)SP-Al 100uf/6.3V (2)Polymer
25、 tantalum capacitor 100uf/10V (3)Ceramic capacitor 100uf/6.3V (4)Low ESR tantalum capacitor 100uf/10V,Stable capacitance,Polymer Organic Semi-conductive Capacitor,POS-CAP,Features of POSCAP *Low profile chip capacitor *Low impedance and low ESR at high frequency *High ripple current capability *Exce
26、llent noise-absorbent characteristics *Excellent temperature characteristics up to -55 *More superior rather than Tantalum-cap in safety,Frequency Characteristics,Frequency Characteristics,Film Capacitor,0.01uf/16V 0.1uf/16V,Panasonic ECHU series,Chip Film capacitor,Panasonic ECHU series,0.01uf/16V 0.1uf/16V,Panasonic ECHU series,0.01uf/16V 0.1uf/16V,Panasonic ECHU series,0.01uf/16V 0.1uf/16V,Panasonic ECHU series,0.01uf/16V 0.1uf/16V,Panasonic ECHU series,0.01uf/16V 0.1uf/16V,Characteristics Compared List,
